A man places an order for a voice-activated car that does anything he tells it to do.

When the car arrives, he tests it and finds to his satisfaction that the car carries out all instructions without error.

One day, his wife tells him to pick up their kids Bob and Jill from school.

So the man orders the car: “Go and bring my children home from school.”

The car goes off, and takes longer than usual. The couple begins to worry and is about to call the cops when the car returns with a full load of children – the landlady’s two daughters, their choir mistress’s two sons, his wife’s best friend’s daughter, their pastor’s son and their neighbor’s three sons.

The wife starts to shout at her husband: “What? Don’t tell me all these are your children!”

The man responds calmly: “Before you go all high and mighty on me, first tell me why Bob and Jill are not in the car.”